Cold activation in PT-INR samples–Myth or reality in the modern laboratory?
Guidelines on storage for samples intended for Prothrombin Time–International Normalized Ratio (PT-INR) analysis have changed over time, sometimes advising against cold storage due to presumed cold activation of the coagulation cascade. Previous studies on PT-INR storage have mainly been underpowered, performed in glass tubes, and not in a modern laboratory setting. In this study, we re-analyzed 1
